Irrigation Water Conveyance and Application Methods
Subtopic: Irrigation efficiencies
Question Statement:
A stream of $100\text{ L/s}$ is diverted from a canal. $80\text{ L/s}$ is delivered to the field inlet. Out of the water delivered to the field, $60\text{ L/s}$ is stored in the root zone depth. The water application efficiency ($\eta_a$) of the system in percentage is ________ (answer in integer).
Answer Key:
75
Step-by-Step Solution & Explanation
Water application efficiency is defined as the ratio of water stored in the crop root zone to the water delivered to the field plot:
$\eta_a = \frac{W_s}{W_f} \times 100 = \frac{60\text{ L/s}}{80\text{ L/s}} \times 100 = 75.0\%$